MM74HC74AM

MM74HC74AM is a dual D-type positive-edge-triggered flip-flop in the 74HC CMOS family. Each flip-flop captures the D input on the rising clock edge and stores it until the next edge. It has asynchronous preset (PRE) and clear (CLR) inputs that can force Q high or low independently of the clock. Outputs are Q and Q̅ (the complement). Supply is typically 2–6 V (commonly 5 V), with low power and fast switching. Propagation delays are on the order of tens of nanoseconds at 5 V. Applications include data storage, clock division, counters, shift registers, and timing circuits. Important notes: keep PRE and CLR deasserted (inactive) during normal operation; changing them near a clock edge can cause undefined outputs. Ensure D is stable at the clock edge. For exact pinout, timing diagrams, and electrical characteristics, consult the MM74HC74AM datasheet from the manufacturer.

Equivalents (dual D-type flip-flops with async preset/clear) include:
- SN74HC74 / 74HC74
- 74HCT74
- MC74HC74 / MC74LS74
- 74AC74 / 74ACT74
- 74F74
These are functionally the same device in different logic families or manufacturers.

Here are the key features of MM74HC74AM (dual D-type flip-flops):
- Dual D-type flip-flops, positive-edge triggered
- Asynchronous preset (PR) and clear (CLR) inputs (active-low)
- Q and Q̄ outputs for each flip-flop
- Master–slave configuration for true edge triggering
- 2 V to 6 V operating supply range (typical 4.5–5.5 V)
- CMOS technology: low power, high noise immunity
- High-speed operation (typical propagation delay around 10 ns at 5 V)
- 14-pin package (AM suffix denotes package type, e.g., plastic DIP/SMD variant)
Optional note: Used for data storage, timing, frequency division, and basic flip-flop applications.

- Pin count: 14 pins (DIP-14 / SOIC-14 variants).
- Function: Dual D-type, positive-edge-triggered flip-flop with asynchronous preset (PRE) and clear (CLR) inputs. Each flip-flop captures the D input on the rising edge of CLK and provides Q and Q̅ outputs. PRE and CLR are active-low asynchronous set/reset; includes Vcc and GND pins.

- Manufacturer: ON Semiconductor (the MM74HC74AM is part of ON Semiconductor’s Motorola-heritage 74HC family).
- What kind of company: A global semiconductor company that designs, manufactures, and sells integrated circuits and discrete electronic components for automotive, industrial, communications, and consumer markets.

MM74HC74AM is a dual D-type positive-edge-triggered flip-flop with asynchronous preset (PRE) and clear (CLR).
Typical application areas:
- Synchronous data storage and transfer in digital systems
- Data synchronization between clock domains and timing alignment
- State machine implementation and sequencing
- Frequency division (e.g., divide-by-2) using feedback from Q to D
- Pulse generation and timing circuits (edge-triggered capture)
- Debounce and conditioning of switch signals in gated logic
These use cases leverage its two independent D flip-flops in a single package.

SOIC-14: a 14-pin small-outline package (surface-mount).